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Journal of Immunology Research
Volume 2017, Article ID 1720902, 5 pages
https://doi.org/10.1155/2017/1720902
Research Article

Performance Characteristics of Different Anti-Double-Stranded DNA Antibody Assays in the Monitoring of Systemic Lupus Erythematosus

1Inova Diagnostics Inc., San Diego, CA, USA
2Exagen Diagnostics, Vista, CA, USA

Correspondence should be addressed to Thierry Dervieux; moc.negaxe@xueivredt

Received 7 July 2017; Accepted 22 October 2017; Published 31 December 2017

Academic Editor: Ethan M. Shevach

Copyright © 2017 Michael Mahler et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objective. We sought to evaluate different anti-double-stranded DNA assays for their performance characteristics in monitoring disease activity fluctuations in systemic lupus erythematosus (SLE). Methods. 36 active SLE patients were followed monthly. At each study visit (total ), blood was collected and disease activity was scored using the SELENA-SLEDAI (excluding anti-dsDNA or complement components) and by a physician’s global assessment (PGA). Four anti-dsDNA tests were compared. Linear mixed-effects models with random intercept and fixed slopes were used to evaluate the relationship between the longitudinal fluctuations of disease activity and anti-dsDNA titers. Results. At enrollment, positivity for QUANTA Lite and high-avidity anti-dsDNA assay was both 64% and significantly lower than anti-dsDNA positivity by QUANTA Flash (83%) and CLIFT (96%). Linear mixed-effects modeling indicated that the change in clinical SELENA-SLEDAI scores was associated with the titers of all anti-dsDNA with QUANTA Flash yielding the highest marginal R2 (0.15; ). QUANTA Flash was the only anti-dsDNA assay significantly associated with the change in PGA (marginal ; ). Conclusion. These data indicate that anti-dsDNA antibodies determined by QUANTA Flash have a value in monitoring SLE disease activity.